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首页> 外文期刊>ACS applied materials & interfaces >Rapid One-Pot Microwave Synthesis of Mixed-Linker Hybrid Zeolitic-Imidazolate Framework Membranes for Tunable Gas Separations
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Rapid One-Pot Microwave Synthesis of Mixed-Linker Hybrid Zeolitic-Imidazolate Framework Membranes for Tunable Gas Separations

机译：快速单壶微波合成混合接头杂交沸石 - 咪唑酯骨架膜，用于可调谐气体分离

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摘要

The relatively slow and complex fabrication processes of polycrystalline metal organic framework (MOF) membranes often times restrict their way to commercialization, despite their potential for molecular separation applications. Herein, we report a rapid one-pot microwave synthesis of mixed linker hybrid zeolitic-imidazolate framework (ZIF) membranes consisting of 2-methylimidazolate (ZIF-8 linker) and benzimidazolate (ZIF-7 linker) linkers, termed ZIF-7-8 membranes. The fast volumetric microwave heating in conjunction with a unique counter diffusion of metal and linker solutions enabled unprecedented rapid synthesis of well-intergrown ZIF-7-8 membranes in similar to 90 s, the fastest MOF membrane preparation up to date. Furthermore, we were able to tune the molecular sieving properties of the ZIF-7-8' membranes by varying the benzirnidazole-to-2-methylimidazole (bIrn-to-mIm) linker ratio in the hybrid frameworks. The tuning of their molecular sieving properties led to the systematic change in the permeance and selectivity of various small gases. The unprecedented rapid synthesis of wellintergrown ZIF-7-8 membranes with tunable molecular sieving properties is an important step forward for the commercial gas separation applications of ZIF membranes.
机译：尽管它们适用于分子分离应用，但多晶金属有机框架（MOF）膜的相对缓慢和复杂的制造方法通常会限制它们的商业化方式。在此，我们报告了由2-甲基咪唑酯（ZIF-8接头）和苯并咪唑酯（ZIF-7接头）接头组成的混合接头杂交沸石 - 咪唑酯骨架（ZIF）膜的快速单壶微波合成膜（ZIF-8接头）接头。膜。快速体积微波加热与金属和接头溶液的独特计数器扩散相同，使得良好的ZIF-7-8膜具有前所未有的快速合成，类似于90秒，最快的MOF膜制备最新。此外，我们能够通过改变杂交框架中的苯并苯甲唑-2-甲基咪唑（Birn-to-Mim）连接比来调谐ZIF-7-8'膜的分子筛分性质。它们的分子筛分特性调整导致了各种小气体的渗透率和选择性的系统变化。具有可调谐分子筛分特性的井中的ZIF-7-8膜的前所未有的快速合成是ZIF膜的商业气体分离应用的重要步骤。

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